Environmental Engineering Reference
In-Depth Information
•
vessel details,
•
type of analysis, and
•
date of transfer and signature of each involved party representatives.
Sample Analysis
There are two fundamentally different approaches to analyse ballast water samples
to proof compliance with BWM requirements, i.e., the samples may be analysed
indicatively or in detail. Comprehensive organism detection method reports were
prepared by Gollasch and David (
2010b
) for EMSA and by Gollasch et al. (
2012
) in
the framework of the Interreg IVB Project Ballast Water Opportunity. Both reports
were considered in detail when drafting this part of this topic chapter. It was con-
cluded that organism detection technologies that enable both an indicative and
detailed inspection of ballast water samples are available today. This conclusion
was also supported by our tests conducted on board of commercial vessels to evalu-
ate the suitability of such technologies for practical work by PSC.
In general, an indicative sample analysis is meant to identify potentially non-
compliant ballast water in an early stage to avoid such ballast water discharges.
Should an indicative sample analysis result in doubts whether or not the BWM
requirements were met, a detailed compliance control sample analysis may follow.
However, a detailed sample analysis may also be conducted without a preceding
indicative sample analysis.
Criteria for the Selection of Organism Detection Technologies
for Ballast Water Compliance Control
Should sample processing be needed to prove compliance with the standards D-1
and/or D-2, the methods to be used for both indicative and a detailed sample analy-
sis may have to be selected according to the following criteria.
Accuracy/Precision
The accuracy and precision of the sample processing method is critical as inappro-
priate sample processing techniques may result in a wrong compliance determina-
tion due to, e.g., missing organisms. Therefore only tested methods or at best
standard methods, such as ISO methods, should be used for the purpose of compli-
ance control tests. For the analysis of bacteria such methods exist, but for phyto- and
zooplankton organisms new methods had to be developed or existing methods had
to be adapted. One of the reasons is that the D-2 standard refers to viable organisms,
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